描述
Micromax 1731 High Reliability Resistor Paste for Hybrid Circuits, MacDermid Alpha
Type: Resistor Paste
Pack: 100G / 1000G
Resistivity: 10Ω-1MΩ/sq
Viscosity: 145-210 Pa.s
Firing: 850°C / 60 min
Shelf Life: 6 months
MacDermid Alpha Micromax 1731 is a screen-printable resistor composition developed specifically for demanding hybrid microcircuit applications. Offering 10Ω/sq to 1MΩ/sq sheet resistivity, TCR below 100 ppm/°C, and post-trim stability under 0.5% ΔR, this paste is engineered for long-term reliability in critical electronic systems.
Part of the Micromax Series 1700 materials system, Micromax 1731 is a thick-film resistor paste formulated for high reliability hybrid circuits that demand exceptional long-term electrical stability. This composition delivers TCR values below 100 ppm/°C even with blended resistor formulations, and maintains stable performance across variations in firing temperature, peak hold time, and resistor geometry — making it a trusted choice for mission-critical hybrid assemblies.
With a sheet resistivity range spanning 10Ω/sq to 1MΩ/sq, Micromax 1731 supports diverse precision resistor network designs. The paste is optimized for 200-mesh stainless steel screens with 12-18 μm emulsion thickness, producing a dried film thickness of 22-28 μm. It undergoes a 60-minute air firing cycle with a 10-minute peak hold at 850°C, and is fully compatible with Micromax 7484R Ag/Pd conductor terminations. Available in 100G and 1000G containers, the material is RoHS and REACH compliant.
Genuine MacDermid Alpha Micromax Imported Stock & Technical Support
We maintain stable inventory of authentic MacDermid Alpha Micromax 1731 resistor paste. Factory-original TDS and batch-specific COA can be provided upon request for your high reliability hybrid circuit projects.
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Complete TDS, COA, and regulatory documentation available
Key Features of MacDermid Alpha Micromax 1731
- Formulated for high reliability hybrid microcircuits — engineered for demanding applications requiring long-term electrical stability
- Wide sheet resistivity range of 10Ω/sq to 1MΩ/sq — versatile coverage for precision resistor network designs
- TCR below 100 ppm/°C — stable temperature coefficient even with blended resistance grades
- Post-laser trim stability under 0.5% ΔR — consistent final resistance values after trimming operations
- Low process sensitivity — dependable performance across variations in firing profile and geometry
- 850°C air firing optimized — 60-minute cycle with 10-minute peak hold for repeatable production
- Compatible with Micromax 7484R Ag/Pd terminations — validated with silver/palladium conductor systems
- RoHS and REACH compliant — meets international environmental regulations
Primary Applications
- High reliability hybrid microcircuits — resistor networks for critical applications where long-term stability is paramount
- Medical implantable and monitoring devices — stable resistive elements for life-critical medical electronics
- Aerospace and defense avionics — reliable components for mission-critical flight and guidance systems
- Industrial automation and control systems — durable resistor networks for harsh industrial environments
Full Technical Specifications
| Property | Typical Value | Test / Reference |
| Product Type | Thick film resistor paste | — |
| Application | High reliability hybrid microcircuits, precision resistor networks | — |
| Packaging Specification | 100G, 1000G | Standard packaging |
| Resistivity Range | 10Ω-1MΩ/sq | 1.5mm × 1.5mm geometry |
| Viscosity (Brookfield HAT 10 rpm) | 145-210 Pa.s | SC4-14/6R, 25°C |
| Recommended Mesh | 200 mesh | Stainless steel |
| Emulsion Thickness | 12-18 μm | — |
| Recommended Film Thickness | 22-28 μm | Dried thickness |
| Drying Time | 10-15 min | 150°C |
| Drying Temperature | 150°C | — |
| Firing Peak Temperature | 850°C | 10 min at peak, 60 min total |
| TCR Performance | <100 ppm/°C | 25-125°C / -55-25°C |
| Post Laser Trim Stability | <0.5% ΔR | All standard test conditions |
| Process Sensitivity | Low | Firing temperature, time, geometry |
| Termination Compatibility | Micromax 7484R Ag/Pd conductor | Prefired at 850°C |
| Substrate Compatibility | 96% alumina | — |
| Encapsulant | Glass encapsulation not required (QQ550 recommended for extreme environments) | — |
| Environmental Compliance | RoHS, REACH | — |
| Shelf Life | 6 months in unopened containers | — |
| Storage Temperature | 5-30°C | — |
Note: All listed values are typical and may vary by batch. Independent qualification testing is required prior to production use.
Recommended Processing Conditions
| Parameter | Recommended Value |
| Mixing Prior to Use | Slow gentle hand-stirring, 1-2 minutes |
| Optimal Printing Temperature | 20-23°C |
| Screen Mesh | 200 mesh stainless steel |
| Emulsion Thickness | 12-18 μm |
| Dried Film Thickness | 22-28 μm |
| Leveling Time | ≥10 minutes at room temperature |
| Drying Temperature | 150°C |
| Drying Time | 10-15 minutes |
| Firing Peak Temperature | 850°C |
| Total Firing Cycle | 60 minutes (10 min at peak) |
| Firing Atmosphere | Air |
| Substrate | 96% alumina |
| Termination | Micromax 7484R Ag/Pd conductor |
| Resistor Geometry | 1.5mm × 1.5mm |
Handling and Storage Recommendations
| Storage Rules | Store in tightly sealed containers in clean, stable environment at 5-30°C. |
| Shelf Life | 6 months in unopened containers from date of shipment. |
| Pre-use Preparation | Thoroughly mix prior to use. Some settling may occur during storage. |
| Thinning | Not normally required; use Micromax 4036 thinner sparingly for evaporative losses. |
Official Technical Documentation
| Document Type | Document Introduction | Document Request |
| TDS | MacDermid Alpha Micromax 1731 original factory technical data sheet | Request TDS |
| COA | Batch-specific certificate of analysis | Request COA |
| SDS | Safety Data Sheet for handling and storage | Request SDS |
Frequently Asked Questions
What is MacDermid Alpha Micromax 1731?
Micromax 1731 is a Series 1700 resistor paste engineered for high reliability hybrid circuits, offering TCR below 100 ppm/°C and post-trim stability under 0.5% ΔR with 850°C air firing.
What resistivity range does Micromax 1731 cover?
It covers 10Ω/sq to 1MΩ/sq, supporting diverse precision resistor network designs.
What is the viscosity of Micromax 1731?
Viscosity is 145-210 Pa.s at 25°C (Brookfield HAT, SC4-14/6R, 10 rpm).
What firing profile is recommended for Micromax 1731?
A 60-minute air firing cycle with 10-minute peak hold at 850°C, including 20 minutes above 800°C and 30 minutes above 600°C.
What dried film thickness is recommended for Micromax 1731?
Recommended dried film thickness is 22-28 μm using 200 mesh screens and 12-18 μm emulsion.
How stable is Micromax 1731 after laser trimming?
Average resistance shift is below 0.5% ΔR under all standard testing conditions.
What terminations are compatible with Micromax 1731?
Micromax 7484R Ag/Pd conductor prefired at 850°C. Other Ag/Pd compositions also work well.
What packaging options are available for Micromax 1731?
Standard 100G and 1000G containers. Bulk supply options available upon request.
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We supply authentic MacDermid Alpha Micromax 1731 resistor paste for high reliability hybrid circuit applications. Contact our team for bulk quotations, sample availability, original technical documentation, and application engineering consultation.
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Disclaimer: All technical data on this page are for general guidance only and are not product specifications. Buyers must carry out independent trials and verify suitability before bulk ordering. Actual values may vary between production lots.
